+ r = avcodec_receive_frame (context, frame);
+ if (r < 0) {
+ throw DecodeError (N_("avcodec_receive_frame"), name_for_errors, r, *_path);
+ }
+
+ if (av_pix_fmt_desc_get(context->pix_fmt)->flags & AV_PIX_FMT_FLAG_ALPHA) {
+ /* XXX: this repeated setup of a the filter graph could be really slow
+ * (haven't measured it though).
+ */
+ VideoFilterGraph graph(dcp::Size(frame->width, frame->height), context->pix_fmt, dcp::Fraction(24, 1));
+ auto filter = Filter::from_id("premultiply");
+ DCPOMATIC_ASSERT(filter);
+ graph.setup({*filter});
+ auto images = graph.process(frame);
+ DCPOMATIC_ASSERT(images.size() == 1);
+ _image = images.front().first;
+ } else {
+ _image = make_shared<Image>(frame, alignment);
+ }